<template>
    <div class="todo-footer" v-show="total">
        <label>
            <!--<input type="checkbox" :checked="isAll" @change="checkAll"/>-->
            <input type="checkbox" v-model="isAll"/>
        </label>
        <span><span>已完成 {{doneTotal}} </span> / 全部{{total}}</span>
        <button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
    </div>
</template>

<script>
    export default {
        name: "Footer",
        props: ['todos', 'checkAllTodo', 'clearAllTodo'],
        computed: {
            total() {
                return this.todos.length;
            },
            doneTotal() {
                let i = 0;
                this.todos.forEach((todo) => {
                    if (todo.done) i++;
                });
                return i;
            },
            isAll: {
                get() {
                    return this.total === this.doneTotal && this.total > 0;
                },
                set(value) {
                    this.checkAllTodo(value);
                }
            }
        },
        methods: {
            /*checkAll(event) {
                this.checkAllTodo(event.target.checked);
            }*/
            clearAll() {
                this.clearAllTodo();
            }
        }
    }
</script>

<style scoped>
    /*footer*/
    .todo-footer {
        height: 40px;
        line-height: 40px;
        padding-left: 6px;
        margin-top: 5px;
    }

    .todo-footer label {
        display: inline-block;
        margin-right: 20px;
        cursor: pointer;
    }

    .todo-footer label input {
        position: relative;
        top: -1px;
        vertical-align: middle;
        margin-right: 5px;
    }

    .todo-footer button {
        float: right;
        margin-top: 5px;
    }
</style>